Chris Ketelsen

Publications

Peer-Reviewed Articles

• H. Fairbanks, A. Doostan, C. Ketelsen, G. Iaccarino, A Low-Rank Control Variate for Multilevel Monte Carlo
  Simulation of High-Dimensional Uncertain Systems, J. Comp. Phys., 341 (2017), pp. 121-139.


• C. Ketelsen, T. Manteuffel, J. Schroder., Least-squares finite-element solution of the neutron transport equation
  in spherical geometry. SIAM. J. Sci. Comput., 37 (2015), pp. S71-S89.


• T. Dodwell, C. Ketelsen, R. Scheichl, A. Teckentrup, A hierarchical multilevel Markov chain Monte Carlo algorithm with
  applications to uncertainty quantification in subsurface flow. SIAM. J. UQ., Vol. 3, No. 1 (2015), pp. 1075-1108.


• D. Kalchev, C. Ketelsen, P. Vassilevski, Two-level adaptive algebraic multigrid method for sequence of problems
  with slowly varying random coefficients. SIAM J. Sci. Comput., 35 (2013), pp. B1215-B1234.


• M. Brezina, C. Ketelsen, T. Manteuffel, S. McCormick, M. Park, J. Ruge. Relaxation-corrected bootstrap algebraic
  multigrid (rBAMG). J. Num. Lin. Alg. Appl., 19 (2012), pp. 178-193.


• C. Ketelsen, T. Manteuffel, S. McCormick. Finite element methods for the Dirac equation using a
  Helmholtz decomposition of the gauge field. J. Num. Lin. Alg. Appl., 17 (2010), pp. 539-556.


• J. Brannick, C. Ketelsen, T. Manteuffel, S. McCormick. Least-squares finite element methods for quantum
  electrodynamics. SIAM J. Sci. Comput., 32 (2010), pp. 398-417.

Proceedings

• K. Yewchuk, C. Ketelsen, A. Limon, Y. Mileyko, J. Hoffman, M. Kouritzin. Tracking and identifying
  of multiple targets. Canadian Appl. Math Quart., 12 (2004), pp. 103-124.

Theses

• C. Ketelsen. Least-squares finite element methods for quantum electrodynamics. ProQuest LLC,
  Ann Arbor, MI, 2009. Thesis (PhD) - University of Colorado at Boulder.


• C. Ketelsen. The numerical investigation of two problems in lead-acid battery design,
  Pullman, WA, 2005. Thesis (MS) - Washington State University.

Presentations

Invited Talks

• Department of Applied Mathematics Colloquium - University of Colorado at Boulder:
  January 2014 - Boulder, CO
  Multilevel Markov Chain Monte Carlo Methods for Uncertainty Quantification in Subsurface Flow


• Computational Mathematics Seminar - University of Colorado at Boulder:
  September 2013 - Boulder, CO
  An Introduction to Multilevel Monte Carlo Methods


• 2012 SIAM Conference on Uncertainty Quantification -- Minisymposium on Random Media: Models, Simulation, and Applications:
  April 2012 - Raleigh, NC
  Adaptive AMG for Diffusion Equations with Stochastic Coefficients


• Special Semester on Multiscale Simulation & Analysis in Energy and the Environment (RICAM):
  December 2011 - Linz, Austria
  Adaptive AMG for Diffusion Equations with Stochastic Coefficients


• Computational Mathematics Seminar - University of Colorado at Boulder:
  September 2010 - Boulder, CO
  A Least-Squares Finite-Element Discretization of the Schwinger Model


• 2009 SIAM Annual Meeting -- Minisymposium on Adaptive Algebraic Multigrid Methods
  July 2009 - Denver, CO
  Adaptive Smoothed Aggregation Multigrid for the 2D Schwinger Model of Quantum Electrodynamics


• CNLS Seminar - Center for Nonlinear Studies, Los Alamos National Laboratory:
  August 2008 - Los Alamos, NM
  Least-Squares Finite-Element Methods for Quantum Chromodynamics

Selected Contributed Talks

• Sixteenth Copper Mountain Conference on Multigrid Methods:
  March 2013 - Frisco, CO
  Multilevel Markov Chain Monte Carlo Methods for Uncertainty Quantification in Subsurface Flow


• Twelfth Copper Mountain Conference on Iterative Methods:
  March 2012 - Frisco, CO
  An Element-Free Adaptive Algebraic Multigrid Method for Markov Chain Monte Carlo Simulation


• 2011 DOE Applied Mathematics Program Meeting:
  October 2011 - Washington, DC
  Adaptive AMG for Diffusion Equations with Stochastic Coefficients


• Eleventh Copper Mountain Conference on Iterative Methods:
  April 2010 - Frisco, CO
  A Gauge Invariant Discretiztion of Quantum Electrodynamics by Least-Squares Finite Elements


• Fourteenth Copper Mountain Conference on Multigrid Methods:
  March 2009 - Frisco, CO
  Multigrid Solvers for Quantum Electrodynamics


• Tenth Copper Mountain Conference on Iterative Methods:
  April 2008 - Frisco, CO
  A Least-Squares Approach to Disordered Physical Systems


• 2008 SIAM Front Range Student Conference:
  March 2008 - Denver, CO
  Numerical Challenges in Lattice Quantum Chromodynamics

Posters

• Special Semester on Multiscale Simulation & Analysis in Energy and the Environment (RICAM):
  December 2011 - Linz, Austria
  An Adaptive Algebraic Multigrid Method for Markov Chain Monte Carlo Simulation


• Lawrence Livermore National Laboratory Postdoctoral Poster Symposium:
  May 2011 - Livermore, CA
  Least-Squares Finte-Element Methods for the Neutron Transport Equation in Spherical Geometry


• Washington State University Academic Showcase:
  April 2005 - Pullman, WA
  Modeling the Effects of Retinal Light Exposure on the Circadian Rhythm